/**
 * Copyright 2000 self.com.au
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. (http://www.apache.org/licenses/LICENSE-2.0)
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed 
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for 
 * the specific language governing permissions and limitations under the License.
 *
 * <dhamma-message src="Atisha (11th century Tibetan Buddhist master)">
 * 	The greatest achievement is selflessness. The greatest worth is self-mastery.
 * 	The greatest quality is seeking to serve others. The greatest precept is continual awareness.
 * 	The greatest medicine is the emptiness of everything. The greatest action is not conforming with the worlds ways.
 * 	The greatest magic is transmuting the passions. The greatest generosity is non-attachment.
 * 	The greatest goodness is a peaceful mind. The greatest patience is humility.
 * 	The greatest effort is not concerned with results. The greatest meditation is a mind that lets go.
 * 	The greatest wisdom is seeing through appearances. 
 * </dhamma-message>
 *
 * @author Ashin Wimalajeewa
 */
package self.amigo.editor.cmd;

import java.awt.Point;
import java.awt.Rectangle;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import self.gee.IGraphicElement;
import self.gee.IPointSeriesElement;
import self.gee.IRectangularElement;
import self.gee.editor.EventManager;
import self.gee.editor.ICommand;
import self.gee.editor.IDiagramEditor;

public class ElementResize implements ICommand {
  private IDiagramEditor  editor;
  private EventManager    controller;
  
  private IGraphicElement element;
  
  private Rectangle       currentBounds = new Rectangle();
  private Rectangle       originalBounds = new Rectangle();
  private List            currentPoints = new ArrayList();
  private List            originalPoints = new ArrayList();
  
  public ElementResize( IDiagramEditor ed, EventManager ctl, IGraphicElement elem ) {
    editor = ed;
    controller = ctl;
    element = elem;
    initFrame( originalPoints, originalBounds );
  }
  
  public void endMovement() {
    initFrame( currentPoints, currentBounds );
  }
  
  public void execute() {
    if ( element instanceof IPointSeriesElement ) 
      executePointSeries();
    else
      executeRectangular();
  }
  
  public void undo() {
    if ( element instanceof IPointSeriesElement ) 
      undoPointSeries();
    else
      undoRectangular();
  }

  public void executeRectangular() {
    final List selection = Collections.singletonList( element );
    final List refreshedElements = SelectionUtils.toNewElementList( selection, controller.diagramLayer );
    
    controller.diagramLayer.beginUpdate();
    ((IRectangularElement) element).setBounds( currentBounds );
    controller.diagramLayer.endUpdate();
    editor.setSelectedElements( refreshedElements );
    editor.getSource().redraw();
  }
  
  private void executePointSeries() {
    List selection = Collections.singletonList( element );
    java.util.List refreshedElements = SelectionUtils.toNewElementList( selection, controller.diagramLayer );
    IPointSeriesElement refreshedElem = (IPointSeriesElement) refreshedElements.get( 0 );
    controller.diagramLayer.beginUpdate();
    refreshedElem.setFramePoints( currentPoints );
    controller.diagramLayer.endUpdate();
    editor.setSelectedElements( refreshedElements );
    editor.getSource().redraw();
  }
  
  private void undoRectangular() {
    final List selection = Collections.singletonList( element );
    final List refreshedElements = SelectionUtils.toNewElementList( selection, controller.diagramLayer );

    controller.diagramLayer.beginUpdate();
    ((IRectangularElement) element).setBounds( originalBounds );
    controller.diagramLayer.endUpdate();
    editor.setSelectedElements( refreshedElements );
    editor.getSource().redraw();
  }
  
  private void undoPointSeries() {
    List selection = Collections.singletonList( element );
    java.util.List refreshedElements = SelectionUtils.toNewElementList( selection, controller.diagramLayer );
    IPointSeriesElement refreshedElem = (IPointSeriesElement) refreshedElements.get( 0 );
    controller.diagramLayer.beginUpdate();
    refreshedElem.setFramePoints( originalPoints );
    controller.diagramLayer.endUpdate();
    editor.setSelectedElements( refreshedElements );
    editor.getSource().redraw();
  }
  
  private void initFrame( List store, Rectangle rectStore ) {
    if ( element instanceof IPointSeriesElement ) {
      ((IPointSeriesElement) element).getFramePoints( store );
      int max = store.size();
      for ( int cntr = 0; cntr < max; cntr++ ) 
        store.set( cntr, new Point((Point)store.get(cntr)) );
    } else if ( element instanceof IRectangularElement ) {
      Rectangle bnds = ((IRectangularElement) element).getBounds();
      rectStore.setBounds( bnds );
    } else
      throw new IllegalArgumentException( "element must be either a IPointSeriesElement or a IRectangularElement" );
  }
}